High-elasticity high-pressure impact-resistant wear-resistant rubber carpet and preparation process

Abstract

The invention discloses a high-elasticity high-pressure impact-resistant wear-resistant rubber carpet and a preparation process, and relates to the technical field of rubber. The nitrile rubber composite material comprises the following raw material components in parts by weight: 85-100 parts of modified hydrogenated nitrile rubber, 1-5 parts of modified aramid fiber, 10-20 parts of clay, 1-5 parts of modified zinc oxide, 0.5-1 part of an anti-aging agent, 0.5-1 part of stearic acid, 0.5-1 part of an accelerant, 0.5-1.5 parts of sulfur, 1-2 parts of an antioxidant and 1-2 parts of hexadecyl trimethyl ammonium chloride. By adding the modified hydrogenated nitrile rubber, the function of prolonging the service life of the nitrile rubber composite material is realized, a carbon-carbon double bond on a main chain of a nitrile rubber molecule is hydrogenated into a saturated single bond, and the heat resistance of the nitrile rubber composite material is improved; the low-temperature resistance of the nitrile rubber composite material is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rubber, in particular to a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet and a preparation process thereof. Background Art

[0002] With the advancement of science and technology and the improvement of people's quality of life, people have higher and higher requirements for carpet performance, and traditional carpet materials can no longer meet market demand. Due to its excellent performance, nitrile rubber is used as a carpet backing material to enhance the durability of the carpet. Nitrile rubber is polymerized from butadiene and acrylonitrile monomers, and has excellent oil resistance, heat resistance and wear resistance, making it a carpet material.

[0003] With the continuous innovation and development of rubber carpet production technology and materials, the wear resistance and tensile strength of rubber carpets can be further improved by combining with other materials to form nitrile rubber composite materials, thereby extending the service life of rubber carpets. Therefore, a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet and its preparation process are extremely important.

[0004] 1. Patent document CN112063027B discloses a nitrile rubber composite carpet and a preparation method thereof. The above patent achieves the improvement of the bonding strength between the nitrile rubber film and the textile fabric, improves the processing performance of the rubber, improves the gloss and brightness of the film, improves the deformation resistance and wear resistance of the film, and reduces the odor of the rubber. However, the above patent cannot achieve the function of extending the service life of the nitrile rubber composite material.

[0005] 2. Patent document CN118478537B discloses a non-slip functional multi-layer carpet and its manufacturing process. The above patent improves the high temperature resistance of the rubber material, so that the carpet has a longer service life, but the above patent cannot achieve the function of improving the elongation at break of the nitrile rubber composite material.

[0006] 3. Patent document CN105040439B discloses a method for preparing a pile composite carpet. The above patent achieves high flame retardancy and wear resistance of the finished carpet, but the above patent cannot achieve the function of improving the elongation at break of the nitrile rubber composite material.

[0007] 4. Patent document CN113439984B discloses a heat-generating and wear-resistant carpet and a preparation method thereof. The above patent reduces the water absorption of textile fabrics and prevents the graphene oxide from absorbing water molecules in the air when the carpet is heated by far-infrared heat radiation during use. However, the above patent cannot improve the overall strength of the nitrile rubber composite material.

[0008] In summary, the above patents cannot achieve the function of extending the service life of the nitrile rubber composite material, cannot achieve the function of improving the tensile strength of the nitrile rubber composite material, cannot achieve the function of improving the elongation at break of the nitrile rubber composite material, and cannot achieve the function of improving the overall strength of the nitrile rubber composite material, resulting in the problem that the rubber carpet has a short service life and is easy to be damaged; To this end, the present application proposes a highly elastic, high-pressure, impact-resistant, wear-resistant rubber carpet and a preparation process that can extend the service life of nitrile rubber composite materials, improve the tensile strength of nitrile rubber composite materials, improve the elongation at break of nitrile rubber composite materials, and improve the overall strength of nitrile rubber composite materials. Summary of the invention

[0009] The object of the present invention is to provide a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet and a preparation process, so as to solve the technical problems proposed in the above background technology that the service life of the nitrile rubber composite material cannot be extended, the tensile strength of the nitrile rubber composite material cannot be improved, the elongation at break of the nitrile rubber composite material cannot be improved, and the overall strength of the nitrile rubber composite material cannot be improved, resulting in a short service life and easy damage of the rubber carpet.

[0010] To achieve the above object, the present invention provides the following technical solution: a high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet, comprising a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 85-100 parts of modified hydrogenated nitrile rubber, 1-5 parts of modified aramid fiber, 10-20 parts of clay, 1-5 parts of modified zinc oxide, 0.5-1 parts of antioxidant, 0.5-1 parts of stearic acid, 0.5-1 parts of accelerator, 0.5-1.5 parts of sulfur, 1-2 parts of antioxidant, and 1-2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: (1) Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add the modified aramid fiber, stir for 1.5 h using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50 °C, and obtain a masterbatch; (2) Preparation of rubber compound: Pour clay into deionized water and stir for 1 h using a mechanical stirring device to obtain clay gel. Add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 h to obtain rubber compound. (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and an accelerator, sulfur, an antioxidant and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

[0011] Preferably, the preparation method of the modified hydrogenated nitrile rubber comprises the following steps: The hydrogenated nitrile rubber is dissolved in chlorobenzene to prepare a hydrogenated nitrile rubber liquid, the hydrogenated nitrile rubber liquid and potassium hydroxide are mixed and placed in a high-pressure reactor, and nitrogen and hydrogen are filled and discharged three times and three times respectively, and a heating treatment is performed. After reacting for 4 hours, the high-pressure reactor is cooled to room temperature; The product in the high-pressure reactor was poured into a reaction container, and aminoimidazole monomer and potassium hydroxide were added. Nitrogen was filled into the reaction container and stirred using a mechanical stirring device. The mixture was heated for 5 hours and precipitated with anhydrous ethanol. The precipitated rubber sample was placed in a drying oven and the temperature was set to 50°C to obtain a modified hydrogenated nitrile rubber.

[0012] Preferably, the method for preparing the modified aramid fiber comprises the following steps: Preparation of impregnation solution: dopamine and tris(hydroxymethyl)aminomethane are mixed, and sodium persulfate is added to obtain an aromatic dopamine mixed solution; Dopamine modified aramid fiber: pre-treat the aramid fiber, soak the treated aramid fiber in a dopamine mixed solution, take it out after soaking for 24 hours, wash it with deionized water, place the washed fiber in a drying oven, set the temperature to 80°C, and dry it to obtain modified aramid fiber.

[0013] Preferably, the method for preparing hydrogenated nitrile rubber comprises the following steps: Raw material pretreatment: dissolving nitrile rubber in chlorobenzene to prepare nitrile rubber solution, and evenly mixing formic acid and hydrogen peroxide to obtain a mixed solution; Heating treatment: Pour the nitrile rubber solution into a reaction container, place the reaction container in an oil bath, heat to 50°C, then drop the mixed solution into the reaction container and stir for 5 hours; Product treatment: After the product is cooled to room temperature, it is subjected to gum precipitation treatment using anhydrous ethanol. The precipitated gum sample is placed in a drying oven and the temperature is set to 50° C. to obtain hydrogenated nitrile rubber.

[0014] Preferably, the pretreatment in the dopamine-modified aramid fiber step comprises the following steps: Soaking and boiling treatment: immerse the aramid fiber in an acetone solution, heat and boil for 1 hour, take out the aramid fiber after acetone boiling treatment and immerse it in anhydrous ethanol, heat and boil for 1 hour; Surface cleaning of aramid fiber: take out the aramid fiber that has been boiled in anhydrous ethanol, wash it with deionized water, and place the washed aramid fiber in a drying oven at 80°C for drying.

[0015] Preferably, the modified zinc oxide is obtained by modifying nano zinc oxide powder with triethoxypropylsilane, the clay is selected from one of sodium montmorillonite, calcium montmorillonite, attapulgite clay and sepiolite clay, and the antioxidant is triethylene glycol ether-dipropionate.

[0016] Preferably, the accelerator is selected from one of thiazole accelerators, sulfonamide accelerators, thiuram accelerators and dithiocarbamate accelerators.

[0017] Preferably, the antioxidant is selected from one of ketoamine antioxidants, p-phenylenediamine antioxidants, and nickel salt antioxidants.

[0018] Preferably, the preparation process comprises the following steps: S1. Fabric pretreatment: Clean and dry the textile fabrics to remove oil stains and impurities on the surface of the textile fabrics; S2, calendering and molding: calendering the nitrile rubber composite material into a thin sheet through a calender to obtain a film; S3. Heat pressing treatment: overlap the film and the textile fabric, put the overlapped materials into a heat press, perform heat pressing treatment, and obtain a carpet.

[0019] Preferably, the preparation process further comprises the following steps: S21. According to the design requirements of the carpet, use cutting tools to cut the film into the required carpet shape and size.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention achieves the function of extending the service life of the nitrile rubber composite material by adding modified hydrogenated nitrile rubber, and the carbon-carbon double bonds on the main chain of the nitrile rubber molecule are hydrogenated into saturated single bonds, thereby improving the heat resistance of the nitrile rubber composite material. By grafting aminoimidazole monomers on the hydrogenated nitrile rubber molecular chain, the low temperature resistance of the nitrile rubber composite material is improved; 2. The present invention introduces hexadecyltrimethylammonium chloride to make the modified hydrogenated nitrile rubber molecular chain more easily slide from the clay surface, improve the interface interaction between the clay and the rubber matrix, reduce stress concentration and defects at the interface, and improve the tensile strength of the nitrile rubber composite material, thereby achieving the function of improving the tensile strength of the nitrile rubber composite material; 3. The present invention increases the crosslinking density of the nitrile rubber composite material by introducing triethylene glycol ether-dipropionate, forms a uniform grid structure, realizes effective transmission and dispersion of stress, prevents damage to the nitrile rubber composite material caused by local stress concentration, increases the tensile strength of the nitrile rubber composite material, and realizes the function of improving the elongation at break of the nitrile rubber composite material; 4. The present invention adds modified aramid fibers to the nitrile rubber composite material so that when the composite material is subjected to external force, the modified aramid fibers can transfer and disperse stress, thereby preventing the rubber matrix from being damaged and achieving the function of improving the overall strength of the nitrile rubber composite material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the preparation process of the nitrile rubber composite material of the present invention; Figure 2 The schematic diagram of the preparation process of the modified hydrogenated nitrile rubber of the present invention; Figure 3 The present invention is a schematic diagram of the preparation process of hydrogenated nitrile rubber; Figure 4 It is a schematic diagram of the modification process of the aramid fiber of the present invention; Figure 5 It is a schematic diagram of the pretreatment process of the aramid fiber step of the present invention; Figure 6 It is a schematic diagram of the accelerator of the present invention; Figure 7 It is a schematic diagram of the antioxidant of the present invention; Figure 8 Schematic diagram of clay of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1, please refer to Figure 1 , Figure 2 and Figure 3 A high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 2 parts of modified aramid fiber, 20 parts of clay, 5 parts of modified zinc oxide, 1 part of antioxidant, 1 part of stearic acid, 1 part of accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: Preparation of hydrogenated nitrile rubber: dissolving nitrile rubber in chlorobenzene to prepare nitrile rubber solution, uniformly mixing formic acid and hydrogen peroxide to obtain a mixed solution, pouring the nitrile rubber solution into a reaction container, placing the reaction container in an oil bath, heating the reaction container to 50°C, and then dripping the mixed solution into the reaction container, stirring for 5 hours, cooling the product to room temperature, and using anhydrous ethanol to precipitate the product, placing the precipitated rubber sample in a drying oven, and setting the temperature to 50°C to obtain hydrogenated nitrile rubber; Preparation of modified hydrogenated nitrile rubber: dissolving hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber liquid, mixing the hydrogenated nitrile rubber liquid and potassium hydroxide and placing in a high-pressure reactor, respectively filling and discharging nitrogen and hydrogen three times, performing heating treatment, cooling the high-pressure reactor to room temperature after reacting for 4 hours, pouring the product in the high-pressure reactor into a reaction container, adding aminoimidazole monomer and potassium hydroxide, filling nitrogen into the reaction container and stirring with a mechanical stirring device, heating for 5 hours, using anhydrous ethanol to precipitate the rubber, placing the precipitated rubber sample in a drying oven, setting the temperature to 50° C., and obtaining modified hydrogenated nitrile rubber; Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add modified aramid fiber, stir for 1.5 hours using a mechanical stirring device, drop ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50°C, and obtain the masterbatch; Preparation of rubber compound: pour clay into deionized water, stir with a mechanical stirring device for 1 hour to obtain clay gel, add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 hours to obtain rubber compound; Preparation of composite materials: Put the mixed rubber into an open mill, add accelerator, sulfur, antioxidant and hexadecyltrimethylammonium chloride, mix, stand for 16 hours, and then use a flat vulcanizer to vulcanize to obtain a nitrile rubber composite material.

[0024] Furthermore, hydrogenated nitrile rubber is prepared by hydrogenating nitrile rubber. During the hydrogenation reaction of nitrile rubber, the cyano group on the side chain of the nitrile rubber is not affected, so that the polar group cyano group exists on the hydrogenated nitrile rubber molecular chain, thereby enabling the hydrogenated nitrile rubber to maintain excellent oil resistance comparable to that of hydrogenated nitrile rubber. At the same time, since the carbon-carbon double bonds on the main chain of the nitrile rubber molecule are hydrogenated into saturated single bonds, the heat resistance of the rubber material is improved. Through the epoxy ring-opening reaction, aminoimidazole monomers are grafted on the hydrogenated nitrile rubber molecular chain to prepare modified hydrogenated nitrile rubber, thereby improving the low-temperature resistance of the rubber material.

[0025] Example 2, please refer to Figure 1 , Figure 4 and Figure 5A high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 5 parts of modified aramid fiber, 20 parts of clay, 5 parts of modified zinc oxide, 1 part of antioxidant, 1 part of stearic acid, 1 part of accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: Modification of aramid fiber: dopamine and trihydroxymethylaminomethane are mixed, sodium persulfate is added to obtain an aromatic dopamine mixed solution, the aramid fiber is immersed in an acetone solution, heated and boiled for 1 hour, the aramid fiber after the acetone boiling treatment is taken out and immersed in anhydrous ethanol, heated and boiled for 1 hour, the aramid fiber after the anhydrous ethanol boiling treatment is taken out, washed with deionized water, the washed aramid fiber is placed in a drying oven, the temperature is set to 80°C, and dried, the treated aramid fiber is immersed in a dopamine mixed solution, taken out after soaking for 24 hours, washed with deionized water, the washed fiber is placed in a drying oven, the temperature is set to 80°C, and dried to obtain modified aramid fiber; Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add modified aramid fiber, stir for 1.5 hours using a mechanical stirring device, drop ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50°C, and obtain the masterbatch; Preparation of rubber compound: pour clay into deionized water, stir with a mechanical stirring device for 1 hour to obtain clay gel, add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 hours to obtain rubber compound; Preparation of composite materials: Put the mixed rubber into an open mill, add accelerator, sulfur, antioxidant and hexadecyltrimethylammonium chloride, mix, stand for 16 hours, and then use a flat vulcanizer to vulcanize to obtain a nitrile rubber composite material.

[0026] Furthermore, by modifying the surface of the aramid fiber with dopamine, a polydopamine layer rich in catechol groups is formed on the surface of the aramid fiber. The polydopamine layer has excellent adhesion and reactivity, so that the interface bonding between the aramid fiber and the modified hydrogenated nitrile rubber is tighter, and the interface performance between the aramid fiber and the modified hydrogenated nitrile rubber is improved. The modified aramid fiber and the modified hydrogenated nitrile rubber are blended to prepare a nitrile rubber composite material, so that when the nitrile rubber composite material is subjected to external force, the modified aramid fiber can transmit and disperse stress, thereby improving the overall strength of the composite material. At the same time, the aramid fiber itself has high wear resistance. After combining the modified aramid fiber with the modified hydrogenated nitrile rubber, the wear resistance of the nitrile rubber composite material can be further improved. However, with the excessive addition of the modified aramid fiber, the dispersibility of the modified aramid fiber in the modified hydrogenated nitrile rubber becomes poor, and the mixing uniformity of the fiber and the modified hydrogenated nitrile rubber is reduced, thereby affecting the overall performance of the nitrile rubber composite material.

[0027] Example 3, please refer to Figure 1-Figure 8 A high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 2 parts of modified aramid fiber, 10 parts of clay, 5 parts of modified zinc oxide, 1 part of antioxidant, 1 part of stearic acid, 1 part of accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: (1) Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add the modified aramid fiber, stir for 1.5 h using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50 °C, and obtain a masterbatch; (2) Preparation of rubber compound: Pour clay into deionized water and stir for 1 h using a mechanical stirring device to obtain clay gel. Add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 h to obtain rubber compound. (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and an accelerator, sulfur, an antioxidant and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

[0028] Furthermore, the layered structure of clay can make the stress of the nitrile rubber composite material evenly dispersed in the modified hydrogenated nitrile rubber matrix when subjected to external force, thereby enhancing the impact resistance of the nitrile rubber composite material. At the same time, through the reinforcing effect of clay particles on the modified hydrogenated nitrile rubber matrix, clay can significantly improve the wear resistance of the nitrile rubber composite material, thereby extending the service life of the rubber carpet.

[0029] Example 4, please refer to Figure 1 , Figure 6 , Figure 7 and Figure 8 A high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 2 parts of modified aramid fiber, 20 parts of clay, 5 parts of modified zinc oxide, 1 part of ketoamine antioxidant, 1 part of stearic acid, 1 part of thiazole accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 1 part of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: (1) Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add the modified aramid fiber, stir for 1.5 h using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50 °C, and obtain a masterbatch; (2) Preparation of rubber compound: Pour clay into deionized water and stir for 1 h using a mechanical stirring device to obtain clay gel. Add masterbatch, clay gel, modified zinc oxide, ketoamine antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 h to obtain rubber compound. (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and thiazole accelerator, sulfur, antioxidant and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

[0030] The electronegativity of the clay flakes causes the negative charge on the clay surface to attract the quaternary ammonium salt cations of hexadecyltrimethylammonium chloride, causing the hexadecyltrimethylammonium chloride to be adsorbed on the clay surface. At the same time, the alkyl chains of hexadecyltrimethylammonium chloride separate the clay flakes from the cyano groups on the modified hydrogenated nitrile rubber molecular chains, thereby weakening the dipole-dipole interaction between the clay and the cyano groups on the modified hydrogenated nitrile rubber molecular chains, allowing the modified hydrogenated nitrile rubber molecular chains to easily slide from the clay surface, thereby improving the interface interaction between the clay flakes and the modified hydrogenated nitrile rubber matrix, thereby increasing the tensile strength of the nitrile rubber composite material and increasing the overall strength of the nitrile rubber composite material.

[0031] Example 5, please refer to Figure 1 , Figure 6 , Figure 7 and Figure 8A high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 2 parts of modified aramid fiber, 20 parts of clay, 5 parts of modified zinc oxide, 1 part of ketoamine antioxidant, 1 part of stearic acid, 1 part of thiazole accelerator, 1.5 parts of sulfur, 1 part of triethylene glycol ether-dipropionate, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: (1) Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add the modified aramid fiber, stir for 1.5 h using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50 °C, and obtain a masterbatch; (2) Preparation of rubber compound: Pour clay into deionized water and stir for 1 h using a mechanical stirring device to obtain clay gel. Add masterbatch, clay gel, modified zinc oxide, ketoamine antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 h to obtain rubber compound. (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and a thiazole accelerator, sulfur, triethylene glycol ether-dipropionate and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

[0032] The phenolic hydroxyl groups on the antioxidant triethylene glycol ether-dipropionate form hydrogen bonds with the cyano groups on the modified hydrogenated nitrile rubber molecular chains, thereby increasing the crosslinking density of the nitrile rubber composite material and forming a uniform rubber grid. When the nitrile rubber composite material is subjected to external forces, it plays a role in stress homogenization, preventing the nitrile rubber composite material from being damaged due to local stress concentration, thereby increasing the tensile strength of the nitrile rubber composite material.

[0033] Example 6, please refer to Figure 1 , Figure 6 , Figure 7 and Figure 8 A high-elastic, high-pressure, impact-resistant and wear-resistant rubber carpet comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 2 parts of modified aramid fiber, 20 parts of sodium montmorillonite, 1 part of modified zinc oxide, 1 part of ketoamine antioxidant, 1 part of stearic acid, 1 part of thiazole accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: (1) Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add the modified aramid fiber, stir for 1.5 h using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50 °C, and obtain a masterbatch; (2) Preparation of rubber mix: Pour sodium montmorillonite into deionized water and stir for 1 h using a mechanical stirring device to obtain clay gel. Add masterbatch, clay gel, modified zinc oxide, ketoamine antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 h to obtain a rubber mix. (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and thiazole accelerator, sulfur, antioxidant and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

[0034] Furthermore, the modified nano zinc oxide acts as a vulcanization activator to accelerate the process of the vulcanization reaction, making the vulcanization of the rubber material more complete, and through the generated cross-linking bonds, the cross-linking network of the nitrile rubber composite material is made denser, thereby improving the tensile strength of the nitrile rubber composite material and improving the overall strength of the nitrile rubber composite material.

[0035] Comparative Example 1, a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet, comprising a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of nitrile rubber, 2 parts of modified aramid fiber, 20 parts of clay, 5 parts of modified zinc oxide, 1 part of antioxidant, 1 part of stearic acid, 1 part of accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: Preparation of masterbatch: dissolve nitrile rubber in chlorobenzene to prepare nitrile rubber solution, add modified aramid fiber, stir for 1.5 hours using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50°C, and obtain a masterbatch; Preparation of rubber compound: pour clay into deionized water, stir with a mechanical stirring device for 1 hour to obtain clay gel, add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 hours to obtain rubber compound; (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and an accelerator, sulfur, an antioxidant and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

[0036] Comparative Example 2, a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet, comprising a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 100 parts of modified hydrogenated nitrile rubber, 2 parts of aramid fiber, 20 parts of clay, 5 parts of modified zinc oxide, 1 part of antioxidant, 1 part of stearic acid, 1 part of accelerator, 1.5 parts of sulfur, 2 parts of antioxidant, and 2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add aramid fiber, stir for 1.5 hours using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50°C, and obtain the masterbatch; Preparation of rubber compound: pour clay into deionized water, stir with a mechanical stirring device for 1 hour to obtain clay gel, add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 hours to obtain rubber compound; Preparation of composite materials: Put the mixed rubber into an open mill, add accelerator, sulfur, antioxidant and hexadecyltrimethylammonium chloride, mix, stand for 16 hours, and then use a flat vulcanizer to vulcanize to obtain a nitrile rubber composite material.

[0037] Performance Testing Test 1 Tensile property test: The samples prepared in Examples 1-6 and Comparative Examples 1-2 were tested according to the national standard GB528-2009 method, and the tensile strength and elongation at break of the samples were recorded; Test 2 Compression permanent deformation performance test: The samples prepared in Examples 1-6 and Comparative Examples 1-2 were tested according to the national standard GB / T7759-2015 method, and the sample data were recorded; Test 3 Oil resistance test: The samples prepared in Examples 1-6 and Comparative Examples 1-2 were tested according to the national standard GB / T1690-2010 method, and the mass change rate of the samples before and after immersion was recorded; Test 4: Heat air aging resistance test: The samples prepared in Examples 1-6 and Comparative Examples 1-2 were tested according to the national standard GB / T3512-2001 method, and the tensile strength retention rate and elongation at break retention rate of the samples were recorded. The tensile strength retention rate = (tensile strength after aging / tensile strength before aging) × 100%, and the elongation at break retention rate = (elongation at break after aging / elongation at break before aging) × 100%.

[0038] Table 1 Test results of sample performance test

[0039] Working principle: The polar group cyano exists on the hydrogenated nitrile rubber molecular chain, which makes the rubber material have excellent oil resistance. At the same time, because the carbon-carbon double bonds on the main chain of the nitrile rubber molecule are hydrogenated into saturated single bonds, the heat resistance of the rubber material is improved. The aminoimidazole monomer is introduced into the hydrogenated nitrile rubber molecular chain to further improve the overall strength of the rubber material. The surface of aramid fiber is modified with dopamine to improve the interface performance between aramid fiber and modified hydrogenated nitrile rubber, and the modified aramid fiber and modified hydrogenated nitrile rubber are blended to prepare nitrile rubber composite material, thereby improving the tensile strength of the nitrile rubber composite material; Triethylene glycol ether-dipropionate forms hydrogen bonds with modified hydrogenated nitrile rubber, thereby increasing the crosslinking density of the nitrile rubber composite material. Hexadecyltrimethylammonium chloride improves the interfacial interaction between the clay flakes and the modified hydrogenated nitrile rubber matrix. The synergistic effect of triethylene glycol ether-dipropionate and hexadecyltrimethylammonium chloride increases the tensile strength and elongation at break of the nitrile rubber composite material.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A high-elastic, high-pressure, impact-resistant, wear-resistant rubber carpet, characterized by: The invention comprises a nitrile rubber composite material, wherein the nitrile rubber composite material comprises the following raw material components in parts by weight: 85-100 parts of modified hydrogenated nitrile rubber, 1-5 parts of modified aramid fiber, 10-20 parts of clay, 1-5 parts of modified zinc oxide, 0.5-1 parts of antioxidant, 0.5-1 parts of stearic acid, 0.5-1 parts of accelerator, 0.5-1.5 parts of sulfur, 1-2 parts of antioxidant, and 1-2 parts of hexadecyltrimethylammonium chloride. The preparation method of the nitrile rubber composite material comprises the following steps: (1) Preparation of masterbatch: Dissolve the modified hydrogenated nitrile rubber in chlorobenzene to prepare hydrogenated nitrile rubber solution, add the modified aramid fiber, stir for 1.5 h using a mechanical stirring device, add ethanol solution to precipitate the rubber, place the precipitated rubber sample in a drying oven, set the temperature to 50 °C, and obtain a masterbatch; (2) Preparation of rubber compound: Pour clay into deionized water and stir for 1 h using a mechanical stirring device to obtain clay gel. Add masterbatch, clay gel, modified zinc oxide, antioxidant, and stearic acid in an internal mixer in sequence, mix, and leave for 16 h to obtain rubber compound. (3) Preparation of composite materials: The rubber mixture was placed in an open mixing mill, and an accelerator, sulfur, an antioxidant and hexadecyltrimethylammonium chloride were added and mixed. After standing for 16 hours, the mixture was vulcanized using a flat vulcanizer to obtain a nitrile rubber composite material.

2. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 1, characterized in that: The preparation method of the modified hydrogenated nitrile rubber comprises the following steps: The hydrogenated nitrile rubber is dissolved in chlorobenzene to prepare a hydrogenated nitrile rubber liquid, the hydrogenated nitrile rubber liquid and potassium hydroxide are mixed and placed in a high-pressure reactor, and nitrogen and hydrogen are filled and discharged three times and three times respectively, and a heating treatment is performed. After reacting for 4 hours, the high-pressure reactor is cooled to room temperature; The product in the high-pressure reactor was poured into a reaction container, and aminoimidazole monomer and potassium hydroxide were added. Nitrogen was filled into the reaction container and stirred using a mechanical stirring device. The mixture was heated for 5 hours and precipitated with anhydrous ethanol. The precipitated rubber sample was placed in a drying oven and the temperature was set to 50°C to obtain a modified hydrogenated nitrile rubber.

3. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 1, characterized in that: The preparation method of the modified aramid fiber comprises the following steps: Preparation of impregnation solution: dopamine and tris(hydroxymethyl)aminomethane are mixed, and sodium persulfate is added to obtain an aromatic dopamine mixed solution; Dopamine modified aramid fiber: pre-treat the aramid fiber, soak the treated aramid fiber in a dopamine mixed solution, take it out after soaking for 24 hours, wash it with deionized water, place the washed fiber in a drying oven, set the temperature to 80°C, and dry it to obtain modified aramid fiber.

4. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 2, characterized in that: The hydrogenated nitrile rubber preparation method comprises the following steps: Raw material pretreatment: dissolving nitrile rubber in chlorobenzene to prepare nitrile rubber solution, and evenly mixing formic acid and hydrogen peroxide to obtain a mixed solution; Heating treatment: Pour the nitrile rubber solution into a reaction container, place the reaction container in an oil bath, heat to 50°C, then drop the mixed solution into the reaction container and stir for 5 hours; Product treatment: After the product is cooled to room temperature, it is subjected to gum precipitation treatment using anhydrous ethanol. The precipitated gum sample is placed in a drying oven and the temperature is set to 50° C. to obtain hydrogenated nitrile rubber.

5. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 3, characterized in that: The pretreatment in the dopamine modified aramid fiber step comprises the following steps: Soaking and boiling treatment: immerse the aramid fiber in an acetone solution, heat and boil for 1 hour, take out the aramid fiber after acetone boiling treatment and immerse it in anhydrous ethanol, heat and boil for 1 hour; Surface cleaning of aramid fiber: take out the aramid fiber that has been boiled in anhydrous ethanol, wash it with deionized water, and place the washed aramid fiber in a drying oven at 80°C for drying.

6. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 1, characterized in that: The modified zinc oxide is obtained by modifying nano zinc oxide powder with triethoxypropylsilane, the clay is selected from one of sodium montmorillonite, calcium montmorillonite, attapulgite clay and sepiolite clay, and the antioxidant is triethylene glycol ether-dipropionate.

7. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 1, characterized in that: The accelerator is selected from one of thiazole accelerators, sulfonamide accelerators, thiuram accelerators and dithiocarbamate accelerators.

8. The high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 1, characterized in that: The antioxidant is selected from one of ketoamine antioxidant, p-phenylenediamine antioxidant and nickel salt antioxidant.

9. A process for preparing a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet, applicable to a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to any one of claims 1 to 8, characterized in that: The preparation process comprises the following steps: S1. Fabric pretreatment: Clean and dry the textile fabrics to remove oil stains and impurities on the surface of the textile fabrics; S2, calendering and molding: calendering the nitrile rubber composite material into a thin sheet through a calender to obtain a film; S3. Heat pressing treatment: overlap the film and the textile fabric, put the overlapped materials into a heat press, perform heat pressing treatment, and obtain a carpet.

10. The process for preparing a high-elasticity, high-pressure, impact-resistant and wear-resistant rubber carpet according to claim 9, characterized in that: The preparation process also includes the following steps: S21. According to the design requirements of the carpet, use cutting tools to cut the film into the required carpet shape and size.

Images